A047038 as tables, graphs or sounds

A047038 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`15`
`3`		`56`
`4`		`209`
`5`		`784`
`6`		`2958`
`7`		`11220`
`8`		`42753`
`9`		`163548`
`10`		`627770`
`11`		`2416804`
`12`		`9328384`
`13`		`36087780`
`14`		`139890764`
`15`		`543246696`
`16`		`2113015731`
`17`		`8230687548`
`18`		`32102370550`
`19`		`125358442460`
`20`		`490049744789`
`21`		`1917595810240`
`22`		`7510507532319`
`23`		`29440544167696`

[1,4,15,56,209,784,2958,11220,42753,163548,627770, 2416804,9328384,36087780,139890764,543246696, 2113015731,8230687548,32102370550,125358442460, 490049744789,1917595810240,7510507532319, 29440544167696]

Last modified December 6 13:45 EST 2009. Contains 170429 sequences.

AT&T Labs Research